class_docstr: BlockSelector is used to prepare the effective window to compute explanation
  from the user provided parameters. This is used while computing timeseries perturbations.
class_docstr_tok: ["BlockSelector","is","used","to","prepare","the","effective","window","to","compute","explanation","from","the","user","provided","parameters",".","This","is","used","while","computing","timeseries","perturbations","."]
code: def __init__(self, start: int, end: int):
      self._start = start
      self._end = end
  
file_path: AIX360/aix360/algorithms/tsutils/tsperturbers/tsperturber.py
imports: import numpy
  import pandas
  from typing import Union
  from abc import ABC, abstractmethod
label_desc: Use image node_id 1 to create a new BlockSelector object  with example: obj = BlockSelector(start, end)